Question
In ∆ABC , G is the centroid , AB = 8 cm, BC= 10 cm and
AC = 12 cm , find GD, where D is the mid-point of BC?Solution
If AD is the median, then we know, AB² + AC² = 2{AD² + (BC/2)²} or 82 + 122 = 2{AD 2 + (10/2) 2 } or 64 + 144 = 2{AD 2 + 25} or 208/2 = AD 2 + 25 or 104 = AD 2 + 25 or AD 2 = 104 – 25 = 79 or AD = √79 = √79 Now G divides median in 2:1 so GD = 1/3 of AD = 1/3 of 4√13 = 4√13/3cm
24.052 + 14.03 × 22.99 – 28.18 × 14.94= ?
`sqrt(7.987 X 24.790 +199.991)`
What will come in the place of question mark (?) in the given expression?
?2 = {40% of (552 – 352 )} – 44
Find the approximate value of Question mark(?) for given equation.
(71.92% of 149.99) ÷ 12.04 + 107.98 = ?
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
(44.79 × 74.21) ÷ (11.862 – 33.12) + 37.48% of ? = 180.23
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
2470.03 ÷ 64.98 x 39.9 = ? + 20.32
25.05% of 220.05 – 10.15% of 119.99 × 2.02 = ?
